Nut lock



1,441619. W. J. WISCH.

NUT LOCK.

FILED SEPT.2. 192i.

Patented Jan. 9, 1923..

EA4LM9 EEWE FFEE..

WALTER J. WISCH, OF BALTIMOBE. MARYLAND, ASSIGI\TOR T0 TEE BULL DOG LOCK WASHER (70., OF BAL'IIMORE, MARYLAND, A CORPORATION OF MARYLAND.

NUT LOGIK.

Application filed. September 2, 1921. Seria1 Nd. 497,835.

Be it known that VVALTER J. VVISCH, citizen of the United States, residing at Baltimore city, in the State of 'Maryland, has invented.certain new and useful' Improvements in Nut Locks, 0f which the following is a specificat-ionI This invention relates t0 improvements in nuf locks, und more particularly to a washer adaptedfor interposition between the nut and the face or surface of a membe1 or members t0 be secured together.

The object of the inyention is to ix np roye upon the nut lock shown and descnbed 1n Patent Number 1,319894 granted t0 Harry (1r. Norwood, and dated October 28, 1919, und the nut lock shown and described in Patent Number 1378116, granted May 17, 1921, t0 G. R. Holmes and Walter J. Wisch, und particularly in that in the present form of washer, the Hat surface of the periphery of the nut operates simultaneously upon the rigid tongues 01 the washer to rock it away f'mm a concentric position. t0x cause the inner edgze 0f the washer to forcefully impinge against the threads 0f the bolt, and furthermoreto provide a washer that Will l e effective t0 positively l0ck the ut against retrograde m )vement upon the shank o'f the. holt, regardless 0f whether 01' not the hole in the nut is concentric therewith, 01

.slightly 0fl center, it being understood, that it frequently occurs that the hole in the nut is not t1ue 01' concentric.

Tlxe invention contemplates a washer whi -h is designed totu1n freely with the nut int'inning it home up0n the shankbut \\'hi('ll will, b v reason of the peculiar formation o1 theaperhnc 01 opening in the washei,

which vmb1uces the shank, czmse the washer the pusiti(m f the washer up0n the shank' u'i the holt. 01' the position the washer assunnes when the1e 1s any tendency toward retmgrude movement. 01 the position that the washer will be forqed t0 when an efiort 3. The numeral 4 designates my irr1proved washer. This is formed 0f thin metal prov1ded upon its periphery with the rigid tongues 5 inclining slightly upward as shown, the under faces ofthe tongues being bevelled from their centers as indicated ab 6 the bevels being upward from the centers of said tongues. These tongues cooperate w1th the hexagonal faces 0f the nut hiareb-y the points of the angles engaging the tongues carry the washer with the nut in threading the nut upon the holt. 'The Washer is arranged t0 loosely fit upon the bolt, and the opening in th washer is variously formedfor the purpose 0f cooperating ivith the nut and threads 0f the holt, in such a way that portions 0f the inner edge 0f the opening in the washer will bite 01 dig into the threads ofthe holt t-o prevent retrograde movement.

A portion of the opening in the waSher is concentric as f01" instance between the. points a, a, and from the p oints a t0 b, a substantially straight edge is formed tangential t0 the concentric portion of the opening, and this straight pa1t merges into the ecce"ntric part o, there being provided at the nd of the conc'entric porti0n and substantially opposite the straight part, a spur 7, a dapted to c'ooperate with the straight port1on t0 cause the edge 0f the opening t0 forcefully impinge upon, 01' bite into the threads 0f the holt at the very beginning 0t' the slightest retrograde movementbf the nut 011 the holt. The washer is placed up0n the holt in the position shown in Fig. 2, that is t0 say the concentric portion 0f the washer, in which position the washer can turn free1y with the nut, in tufning the nut home upon the bolt Hovvever, as shown in Fig. 3, at the beginning of the retrograde. movement of the nut upon the bolt, the peripheral surface 'of the nut acting against the tongues 5, and more particularly, upon the under angular surfaces thereof, will immediately lift the washer transversely f the holt, cansing the stra ight portion of the ini1er edge of the washei, 0r that Portion betWeen a Z) to rid e against the't-hreads 0f tl1e holt, this portion of the washer acting witl1 a Wedging tendency 01' cam-like action to cause the spur t0 bite quickly into tl1e threacls 0f the holt opposite the straight ortion,

1 straightortion 0f the washer causing suid pe1iphery 0f the washe'r, I desire it understood that I may employ one Ing, 0r a num-' ber greater than two, if desirecl, and while I have shown provided opposite the straight portion of the interior periphery of the washer a single spur, such as 7, a number of spurs 1nay be eniployed.

Claims.

l. In combi 1iation with a threaded holt and nut and member through which the holt is extended, a washer loosely arranged upon the bolt betiveen l:he member und tl1e nut, said washer having a rigid tongue adapted tobe engaged by the outer peripheral surface of the nut, the opening in the washerbeing partly concentric and partly eccentric, there being a straight portion connecting the con entric und eccentric portions of' the opening, and a spur arranged substantially opposite the straight portion, all operating substantially as and f01' the purposesei: forth.

2. In. combination with a threaded holt und nut and member through whiclx the bolt is extended, a washer loosely arranged upon the bolt between the member and the nut, und having a rigid tongue engageable by the outer periphery 0f the nut, the opening in the washer being for1ned with a concentric und eccentric portion, and z straight portion coiinecting the two on one si le 0f tl1e wusher, a Spur substanti-nlly opposite the struight portion und at the e1id or' the eccentric portion the engagement of the nut'with tl1e tongue bflng adapted to cause a cam action between the threacls 0f tl1e holt und tl1e portion nnd tl1e spur toklig into the t l1r ezuls to prevent retrogracle inovement 0f the nnt.

In combination with a threaded'bolt and nut, sind a member th'r0ugh which the holt is extended, a washer loosely arranged 1'1p0n the holt between the member and the nut, said washer .having means adjacent its periphery adaptecl to be engaged by the outer surface of tl1e nut, the opening in the washer being partly concentric and partly eccentric, there being a straight porti0n between the-eccentric and concentric portions 0f the opening, the straight ortion bei ng adapted to wedge againstthe shank 0f the holt upon the movement of the nut t0 prevent retrogracle movement 0 f same, means on the inner periphery of the open ing for also impinging against the threads 0f t he bolt, saicl -means conperating witl1 the straight ortion 0f tl1e opening t0 f011n a double engage'zment 01' lock between the washer and holt threads up0n a' retrogrzule movement 0f the nut.

4:. In combination with a, threacled bolt und nut, and a-1nember through whivhthd holt 1s extendedu washer loosely arrangml upon the holt between tl1e me1nberancl the nut, said wa'sher having laterally exter iding means acljacent its periphery for engagement With the su'nfuce of the nut, tl1e opening in the washer being partly concentric und partly eccentric, there being a straight portion between the concentric and eccentric portions 0f the opening, and a spur arranged substantially opposite tl1e straight portion, tl1e straigllt portion being adupted t0 impinge against the threads 0f tl1e holt upon retrograde movement of the nut und in so doing cause the Spur to bite into another Portion or' tl1e thiea(ls 0f tl1e holt to elfect a multiple lock against retrograde m0vement of the nut. 4

5. A wusher 0f the character described comprising a flut plate, means adjacent tl1e peripllery of tl1e platze f0r engage1nent \\ith nut, an opening in the plate f0r tl1e pas sage of n holt, the openingr being partly concentric an(lpartly eurentric und formed with a. straight portion between tl1e concentric und eccentric portions, und a Spur 01' spurs 011 -the inner periphery 0f the openin;g substantially opposite the straight ortion cooperating' with tl1e straight portion when the nut engaging means are engaged l y u nut t0 bring about a multiple l0(.k agruinst Natrogmde movemcnt m u nut up0n the. tlnea ls of a holt.

In testixnony whoreuf l ulliX n1y signulmu in presence 0'f two nitncsses.

WALTER J. W1Slll. \Vitnessesz C. D. BULL, M. A. AIIERN. 

